dendrite/syncapi/sync/request.go

87 lines
2.7 KiB
Go

// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sync
import (
"context"
"net/http"
"strconv"
"time"
"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/util"
log "github.com/sirupsen/logrus"
)
const defaultSyncTimeout = time.Duration(0)
const defaultTimelineLimit = 20
// syncRequest represents a /sync request, with sensible defaults/sanity checks applied.
type syncRequest struct {
ctx context.Context
device authtypes.Device
limit int
timeout time.Duration
since *types.PaginationToken // nil means that no since token was supplied
wantFullState bool
log *log.Entry
}
func newSyncRequest(req *http.Request, device authtypes.Device) (*syncRequest, error) {
timeout := getTimeout(req.URL.Query().Get("timeout"))
fullState := req.URL.Query().Get("full_state")
wantFullState := fullState != "" && fullState != "false"
since, err := getPaginationToken(req.URL.Query().Get("since"))
if err != nil {
return nil, err
}
// TODO: Additional query params: set_presence, filter
return &syncRequest{
ctx: req.Context(),
device: device,
timeout: timeout,
since: since,
wantFullState: wantFullState,
limit: defaultTimelineLimit, // TODO: read from filter
log: util.GetLogger(req.Context()),
}, nil
}
func getTimeout(timeoutMS string) time.Duration {
if timeoutMS == "" {
return defaultSyncTimeout
}
i, err := strconv.Atoi(timeoutMS)
if err != nil {
return defaultSyncTimeout
}
return time.Duration(i) * time.Millisecond
}
// getSyncStreamPosition tries to parse a 'since' token taken from the API to a
// types.PaginationToken. If the string is empty then (nil, nil) is returned.
// There are two forms of tokens: The full length form containing all PDU and EDU
// positions separated by "_", and the short form containing only the PDU
// position. Short form can be used for, e.g., `prev_batch` tokens.
func getPaginationToken(since string) (*types.PaginationToken, error) {
if since == "" {
return nil, nil
}
return types.NewPaginationTokenFromString(since)
}